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tory <br /> delivery pservationoandachainlofecustodyaprocedures. purged <br /> proper <br /> und water was stored onsite in DOS approved, 55-gallon <br /> g appropriate disposal. <br /> drums for subsequent app P <br /> DzscvssTois the <br /> as well as the results <br /> The resul�er samplesfor quarter as <br /> analysis o� <br /> ground wa and sampling events, are <br /> of previous quarterly monitoring surveyforms <br /> summarized in Table I. The water d act3amplivitiereports and <br /> presenting the results of the field activities and <br /> observations, as well as the official. laboratory <br /> chain of custody record, are included in Attachment A. <br /> of the monitoring wells. A <br /> No free product was noted in any based an the depth <br /> ground water potentiometric surface map, water flow <br /> 25, 1991, <br /> to ground water measurements collected on February <br /> is presented in Figure 2. The general ground <br /> •s to the north-northwest with an average hydraulic <br /> direction at the site, as calculated from this same ng well <br /> event, z Figure 3 shows monitoring <br /> gradient of 0.0076 foot/font. <br /> dassoc <br /> etected concentrations of and BTEX <br /> locations and the <br /> constituents and laboratory <br /> Results of this ground water monitoring <br /> analysis indicate the following: <br /> o A sheen of free product was observed in MW-3 during <br /> toring event. However, nosheen was <br /> previous moni <br /> this s, <br /> observed in NiW-3 during howevEr,I .the <br /> had <br /> Ground water samples from Mw-3, <br /> r highest concentrations of dissolved-Phase TPH-G. <br /> o Between November 1990 and February 1991, the <br /> concentrations of THP-G+ toluene, and ethylbenzene <br /> in the water samples Eros have havdece <br /> increased, <br /> while benzene <br /> and T <br /> o The concentrations of SH a2, MWE�constitute 2 , <br /> in Monitoring Wells MW- . <br /> mw <br /> Amw-3, and AMw-4 have remained below reported <br /> detection limits. <br /> o Between the last two sampling events, the <br /> concentrations 4of �,x5 and MWE6.Constituents have <br /> MW-6- <br /> decreased in mW-4, <br /> 3 <br />